Pick-sharpener.



s J. N. SMOTHERS & J. N. CARROLL.

` ,1911. Y 1,017,697. Patented Feb. 20, 1912.

UNITED STATES PATENT OFFICE.

JOHN N. SMOTHERS AND JOI-IN N. CAR-ROLL, OF MORTONS GAP, KENTUCKY.

PICK-SHARPENER.

To all whom it may concern;

Be it known that we, JOHN N. SMoTHERs and JOHN N. CARROLL, both citizensof the United States, and both residing in M ortons Gap, in the countyof Hopkins and State of Kentucky, have invented certain new and usefulImprovements in Pick-Sharpeners, of which the following is aspecification.

This invention relates to dies for giving form to the ends of the picksemployed in coal mining machines. These picks are subjected to suchgreat wear and hard usage as necessitates frequent re-forming andsharpening of the notched cutting or punching end, and it is the objectof the invention to provide an inexpensive and easily operated meanswhereby the re-forming, notching and sharpening may be done in any shoplitted with a forge and hammer competent to operate a pair of dies.

In the accompanying drawings,-Figure l is a perspective view of a pairof dies mounted in a power hammer and with a pick in position to beoperated on the dies. Fig. 2 is a perspective view of the lower dieblock with the'cutter shown in dotted lines. Fig. 3 is a perspectiveview of the cutter detached from the die.

The dies of the present invention are adapted for operation by anyordinary power hammer and as shown in Fig. 1 of the drawings, Aindicates the anvil and B the movable head of-a hammer. The diesindicated generally by C and D are usually formed of machine steel andare of such shape that they may be readily machined. Each die has adovetail projection c whereby it is secured in position and portions ofthe complemental faces of the twodies indicated by the reference lettersC and D are of slightly convex form and adapted to spread and flattenthe ends of the picks. At one side ofthe convex portion D the lower dieis formed with a transverse channel d and at one end of the channel withrecessed seats al adapted for the reception of the laterally projectingwings E of a V-shaped cutter E.

The cutter is held in place by bolts F extending through the die bodyand adapted to clamp the wings of the cutter firmly in their seats whilethe V-shaped central portion of the cutter extends into the channel, asbest shown by the dotted lines in Fig. 2.

Specification of Letters Patent.

Application filed July 19, 1911.

Patented Feb. 20, 1912. Serial No. 639,319.

Then ready for use, the cutting edge f is level with the face of the dieand the upper die is provided with a flat face arranged opposite thecutter as will be readily understood from Fig. l. The lower edge of thecutter preferably seats squarely on the bottom of the channel and,should it become necessary, because of wear, to adjust the cutter a shimof sheet metal may be placed under it. To permit of such adjustment thebolt holes f2, are slightly elongated in a vertical direction as bestseen in Fig. 3.

The construction of the die and cutter are such that the cutter may bemade of metal best calculated to keep its shape and edge when heated,for instance, the socalled selfhardening steel, while the body of thedie may be made ofl metal capable of being easily machined.

In using the dies, the pickis heated redhot, placed on the convexsurface of the anvil die, and by a single or successive blows of themovable die is reduced in thickness and spread to the desired degree.The spread end is then brought into position with the body of the pickin line with the channel and the flattened end over the-cutter,substantially as shown in Fig. l. The blows of the upper die drive thepick down into the channel and cause the cutter to remove a smallV-shaped section of the metal from the end of the pick. This gives thepick the required forked end and leaves it in such form as to requirepractically no further shaping or finishing other than the usualtempering.

It will be observed that the V-shaped cutter which is in the form of arelatively thin blade extends into but not through the channel UZ, theapex of the cutter being arranged between the side wall of said chan neland when the hammer B descends it will cause a V-shaped piece to be cutfrom the pick without spreading the points of the pick as would be thecase if the side walls of the channel were not arranged as shown.

l. A die for forming the forked ends of mining picks, provided with atransverse channel with parallel side Walls and a cutting blade having aV-shaped portion projecting into but not through said channel with itsapex disposed between the side walls thereof, and side Wings extendingfrom said Vshaped portion and attached to the ontside of the die.

2. A die for forming the forked ends of mining picks, provided With atransverse channel with parallel side Walls, and a cut-- ting bladehaving a V-shaped portion arranged in said channel with its cutting edgesubstantially level with the face of the die and its apex disposedbetween the side Walls of the channel, side Wings extending laterallyfrom the V-shaped portion, and means JOHN N. hSMOTHERS. JOHN N. CARROLL.

mark

itnesses R. G. HART, GEO. STORES.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

